Thanks for pointing it out. Apparently there's no reprint on the DH site and I'm not interested in paying $7.50 for it from KitPlanes.tobinbasford said:BumbleBee,
Its there, just have to look under "newsclips", its the second thing mentioned on that page:
http://www.deltahawkengines.com/article00.shtml
Not quite true. The data they have published on their website seems very reasonable with a lowest BSFC of 0.4 lbs/hp/hr.Jconard said:... and the numbers for BSFC for their engine is so good that it would rival Stationay ship or train engines...that is it is almost at theoretically perfect level, and I frankly don't believe that...
Jconard said:From the DH Website:
currently about 327 lbs including starter, oil pump, fuel pump, water pump, turbocharger, all internal lines and internal exhaust system
As oposed to 280 for the lyc...so about 47 lbs, before you add a couple of gallons of coolant, a radiator, plumbing, and the various support articles for liquid cooling. This will vary with the actual engine you install, etc.
I like the DH engine, but I find their numbers very suspicious, because the BSFC they quote for lycoming is MUCH higher fuel burn than any airplane I have ever flow, and the numbers for BSFC for their engine is so good that it would rival Stationay ship or train engines...that is it is almost at theoretically perfect level, and I frankly don't believe that.
In the end, it will burn less fuel volume per horsepower than current aircraft engines, but I wonder how much less, and what the installed efficiency will be with acutal weight, drag, etc factored in.
What I know for certain is that the comparison numbers they use are embelished.
rv6ejguy said:I agree, the numbers posted on their site are nonsense, who did the math on this chart? http://www.deltahawkengines.com/econom01.shtml
Way heavier, more expensive and at the fuel flows likely to be achieved in the real world with a 2 stroke diesel, it will take a very long time to pay for it. I'd also mention that it is relatively unproven. My advice on new engines is don't be the first one to sign up for one. Also, until jet or diesel fuel is available at many small airports, it is not practical for many.